Vin Diesel Releases More 'Guardians of the Galaxy' Groot Info (Video)

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In a video posted to his Facebook page, the actor showed footage of himself practicing on stilts for his motion-capture role and revealed how much we'll hear from him in the 2014 feature.

Continuing his apparently fearless disregard for Marvel Studios' famed secrecy, Vin Diesel has released a new video via Facebook that again confirms his Guardians of the Galaxy role, as well as reveals just how vocal his wooden alter ego will be during the 2014 movie.

"Do I look like a tree?" Diesel asks during the video as he tests out his stilts for the (motion-captured) role. Later, he doubles down on the identification by saying that he plays "a seven-and-a-half-foot tree" with "one line in the movie" -- a line that, judging by the comic book character's history, would almost definitely be "I am Groot!" (Yes, he likes to announce his own name. He's a giant living tree; he can do that if he wants.)

The size of the role -- the one line, not the seven-and-a-half-foot tall thing -- doesn't bother the Fast & Furious actor, however. "I'm still going to make it the best thing I possibly can," Diesel explains, "even if it means taking angry circus to another level." Somewhere, Marvel executives who had hoped to keep the details of Diesel's involvement in Guardians a secret for a while longer are just shaking their heads in disbelief.